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Thiersteinia ecclesiastica
Thiersteinia ecclesiastica S.W. Wise, D.K. Watkins in S.W. Wise Init. Repts Deep Sea Drilling Proj., 71: 509. Aug 1983
- Name
- Thiersteinia ecclesiastica
- Rank
- Species
- Generic Name
- [Genus] Thiersteinia
- Authors (Name)
- Wise S. W., Jr.
Watkins D. K.
- Authors (Pub.)
- Wise S. W., Jr.
- Publication
- Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean [1983/8]
- Journal
- Initial reports of the Deep Sea Drilling Project
- Volume
- 71
- Page number
- 509
- Year
- 1983
- Fossil Status
- coccoliths
- Stratigraphy
- Coniacian
- Location
- Sample 511-46-1, 100 cm; Falkland Plateau region, South Atlantic Ocean
- Paleoregion
- America (South)
- Diagnosis
- A species of Thiersteinia in which the inner distal margin consists of about 25-30 dimpled elements along side a greater number of outer distal margin elements (numbering about 50). In cross-polarized light the crossbars light up distinctly when rotated in one direction 22 K° to the polarizing direction of the microscope and are quite indistinct when rotated 22%° in the opposite direction (PI. 16, Figs. 3 and 2 respectively). The perforations are generally disposed parallel to the crossbars along the major and minor axes and number rather consistently between 3 and 5 per quadrant. The perforations are subdivided as in B. parca, in such a way as on occasion to resemble the shape of church windows, hence the specific epithet. Long, thin, lathshaped elements separate the central area from the inner distal margin. Another set of small, long, imbricate laths are expressed in a clockwise spiral, barely visible where it emanates from the inner distal margin elements at the point that they abut the outer distal margin. The outer distal margin is about one-third to one-quarter the width of the inner distal margin. The width of the central area is about two and one-half (2.5) times the width of the distal margin (b/a ratio = 2.5).
